2. 外语
  3. The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruption that occurred______.

The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruption that occurred______.

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问题 The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruption that occurred______.
选项 A、the area in which dinosaurs roamed
B、when dinosaurs roamed the area
C、did dinosaurs roam the area
D、dinosaurs roaming the area
答案B
解析 occur是不及物动词，句子的成分已经完整，那么空白处要填的只能是状语．选项中只有B(时间状语when引导时间状语从句)符合状语结构的要求：A如果改为“in thearea which dinosaurs roamed”就对了；C是倒装句，排除；D选项没有状语从句引导词，不能直接用在occur后面。故本题答案为B。
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